# Proof/logic

To prove a statement "If P then Q", it is valid to prove which of the following statements instead?

A. If not Q then not P

B. If Q then P

C. If not P then not Q

D. Q only if P

E. Both P and Q are true

https://brainmass.com/math/discrete-math/proof-logic-15913

#### Solution Summary

This discusses how to proof one conditional by proving a similar conditional.

$2.19